Here's my second attempt at a Tau list at 2000pts. I've decided to focus on a Fire Warrior gunline, supported by Commanders, XV8s, and of course Tactical Drones. It has the feel of a more traditional 5th Edition list (no shiny new toys like Riptides or Ghostkeels) but augmented by two Commanders, Longstrike, and Aun'va to help out with morale. Ultimately it brings a lot of firepower that can deal with heavy infantry, medium vehicles, and (with luck) heavy vehicles. The list might suffer against a true horde army like Orks or Tyranids though. It also brings a high level of Fire Warrior synergy, with a Fireblade, Pulse Accelerator Drone, and Aun'va. There are too few Markerlights, but I only plan on using Markerlights to allow my Ion weapons to re-roll ones to avoid taking Mortal Wounds. The list has 10 Command Points thanks to the high number of HQs, so that's going to be a huge advantage. Anyway, without further ado:

The Pathfinder's drone team would detach and help the Fire Warriors, which would all deploy with the Fireblade and Aun'va between them. The two smaller "heavy weapons" teams could be deploy on far-off objectives. The two Drone Teams would deploy as a skirmish screen in front of the Fire Warrior gunline- I've found that Gun Drones make for better screening units than Kroot. The Plasma Rifle Commander would sit in this group as well, giving them a Mont'ka before flying away and doing his own thing. The Crisis Battlesuit Teams and the Fusion Blaster Commander would stay in reserves and deep strike to destroy critical enemy targets like heavy infantry or tanks. Finally, the Pathfinders will act more as all-purpose snipers with their Ion Rifles, since I doubt Markerlights will be very useful.

Anyway, if you have any ideas on how the list could be improved, or any comments at all, please let me know!